When flying from Singapore to Memphis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
If you book a flight to Memphis from Singapore, you will be flying to Memphis, which is the city’s only airport. Memphis (MEM) is located 13.4 km from the centre of Memphis.
Great question - SIN to MEM just means Singapore Changi Airport to Memphis Airport. Now you’ll know what these unique codes when you look for flights!